Author Topic: Husqvarna 2100 performance upgrade?  (Read 1239 times)

0 Members and 0 Guests are viewing this topic.

Online 3000 FPS

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4464
  • Karma: 274
  • Location: Carpenter, Wyoming
Re: Husqvarna 2100 performance upgrade?
« Reply #30 on: December 23, 2014, 08:42:22 pm »
Dang Shaun sounds like you know your 2100's.    If I ever decide to mod mine I know who I will send it to.
PP 505, 475, 445.

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 21952
  • Karma: 535
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Husqvarna 2100 performance upgrade?
« Reply #31 on: December 23, 2014, 08:42:32 pm »
Thats the info I was digging at. Thanks Shaun.
REDNECK Saw Repair Getter Done

Online srcarr52

  • 6 cube
  • ****
  • Posts: 288
  • Karma: 93
  • Location: IA
Re: Husqvarna 2100 performance upgrade?
« Reply #32 on: December 24, 2014, 11:52:48 am »

Dang Shaun sounds like you know your 2100's.    If I ever decide to mod mine I know who I will send it to.

I kinda specialize in big cc huskys.

Offline Eccentric

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2110
  • Karma: 217
  • Magnesium and Iron.
  • Location: Northern California.
Re: Husqvarna 2100 performance upgrade?
« Reply #33 on: December 25, 2014, 03:48:46 am »
How about relocating the ring pins on a 394XP piston as an alternative to running it backwards or using a 395XP slug?
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Online srcarr52

  • 6 cube
  • ****
  • Posts: 288
  • Karma: 93
  • Location: IA
Re: Husqvarna 2100 performance upgrade?
« Reply #34 on: April 30, 2015, 03:27:09 pm »
How about relocating the ring pins on a 394XP piston as an alternative to running it backwards or using a 395XP slug?

I'd rather not relocate ring pins if I don't have to. There is no cast in boss on the 394 piston where you'd like to put the pins so you wouldn't have much material to hold them in.  With the 395 piston you can't take much out of the squish in order to keep your intake timing in check but they already have plenty of compression so cutting too much out of the squish isn't really necessary.

The hardest part I had forgot about. You have to cut a lot off the base because of the difference in piston crown heights. So much you'll have to massage the dividing wall to get the intake to sit nicely and the carb shelf will have to be dimpled for the carb.

Offline Eccentric

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2110
  • Karma: 217
  • Magnesium and Iron.
  • Location: Northern California.
Re: Husqvarna 2100 performance upgrade?
« Reply #35 on: April 30, 2015, 03:32:49 pm »
How about relocating the ring pins on a 394XP piston as an alternative to running it backwards or using a 395XP slug?

I'd rather not relocate ring pins if I don't have to. There is no cast in boss on the 394 piston where you'd like to put the pins so you wouldn't have much material to hold them in.  With the 395 piston you can't take much out of the squish in order to keep your intake timing in check but they already have plenty of compression so cutting too much out of the squish isn't really necessary.

The hardest part I had forgot about. You have to cut a lot off the base because of the difference in piston crown heights. So much you'll have to massage the dividing wall to get the intake to sit nicely and the carb shelf will have to be dimpled for the carb.


That's what JJ told me when we were discussing piston options a while back.  I can't remember how much he said had to be taken off of the base of the jug................but it's substantial...
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Online srcarr52

  • 6 cube
  • ****
  • Posts: 288
  • Karma: 93
  • Location: IA
Re: Husqvarna 2100 performance upgrade?
« Reply #36 on: April 30, 2015, 05:08:24 pm »
That's what JJ told me when we were discussing piston options a while back.  I can't remember how much he said had to be taken off of the base of the jug................but it's substantial...

It was substantial but well worth it. The one I built like this has a lot of power. The owner uses it for bucking and free hand ripping large oak logs and it usually runs a 36" full skip, square ground with an 8 pin driver. Even dogged in it is still hard to bog. 

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: Husqvarna 2100 performance upgrade?
« Reply #37 on: April 30, 2015, 05:45:21 pm »
Why not put the pin in vertically and peen or weld over?

Online srcarr52

  • 6 cube
  • ****
  • Posts: 288
  • Karma: 93
  • Location: IA
Re: Husqvarna 2100 performance upgrade?
« Reply #38 on: May 08, 2015, 10:12:21 am »
Why not put the pin in vertically and peen or weld over?

The 395 piston also has 1.2mm rings instead of 1.5mm on the 394.  It's all around a better piston. The skirt is a little shorter but both have the same crown height to you still end up cutting a lot off the base of the cylinder.

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: Husqvarna 2100 performance upgrade?
« Reply #39 on: May 08, 2015, 10:46:44 am »
Intake timing is ok after using the shorter piston (skirt ) AND dropping the jug?

 

Related Topics

  Subject / Started by Replies Last post
1 Replies
530 Views
Last post July 06, 2011, 06:25:52 am
by Al Smith
Husqvarna 2100

Started by darren_palms « 1 2 ... 6 7 » Husqvarna

63 Replies
1317 Views
Last post April 25, 2015, 10:21:41 am
by Cut4fun .
0 Replies
160 Views
Last post January 18, 2013, 10:20:59 pm
by darren_palms
Husqvarna 2100

Started by turbo885 « 1 2 3 4 5 » Husqvarna

46 Replies
1072 Views
Last post February 03, 2014, 05:04:02 pm
by Eccentric
5 Replies
228 Views
Last post October 05, 2013, 01:44:26 am
by Eccentric
151 Replies
2691 Views
Last post October 23, 2019, 01:38:04 pm
by raumato01
42 Replies
1025 Views
Last post May 03, 2018, 09:25:53 am
by Cut4fun .
13 Replies
387 Views
Last post May 15, 2015, 05:37:49 pm
by EHP
9 Replies
316 Views
Last post February 12, 2016, 06:47:54 pm
by 604f_1
15 Replies
1165 Views
Last post March 10, 2016, 02:51:43 pm
by Cut4fun .